std::experimental:: nullopt
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nullopt
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Defined in header
<experimental/optional>
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constexpr
nullopt_t nullopt
{
/*unspecified*/
}
;
|
(library fundamentals TS) | |
std::experimental::nullopt
is a constant of type
std::experimental::nullopt_t
that is used to indicate
optional
type with uninitialized state.
See also
|
(library fundamentals TS)
|
indicator of optional type with uninitialized state
(class) |
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